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AS33651 · Registration country: US US — Comcast Cable Communications, LLC

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CMCS · ARIN · Registration country: US US

Identity sourceAS33651 · Registration country: US US Comcast Cable Communications, LLC

NRO allocation data

109IPv4 prefixes
187IPv6 prefixes
93Observed neighbors
RPKIValid: 281Invalid: 4Not found: 11Unknown: 0

Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 00:00 UTC; routeviews2 11 Oct 04:00 UTC; routeviews6 11 Oct 04:00 UTC. Validator: 11 Oct 04:40 UTC. Publication-point issues: 89

Address space details

Overlapping originated prefixes counted once. IPv4 addresses: 82,176

IPv6 addresses: 634068294203857241212467544064

Loading public source data…

Observed originated prefixes

These are observed BGP origins, not an inventory of registered allocations or transit reachability.

Advanced filters

296 matching prefix–origin pairs. Each pair appears once; source observations are in Details.

PrefixRPKILast observedDetails
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Invalid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI invalid
Validation evidence

prefix too specific

{
  "state": "invalid",
  "reason": "prefix too specific",
  "observed_at": "2026-10-11T04:40:37.086268+00:00",
  "source": "Local Routinator",
  "metadata": {
    "rows": 1018604,
    "serial": 43,
    "version": "routinator/0.15.2",
    "publication_point_issues": 89
  },
  "vrps": [
    {
      "prefix": "9.142.0.0/16",
      "asn": 6079,
      "max_length": 24,
      "trust_anchor": "ripe"
    },
    {
      "prefix": "9.142.96.0/19",
      "asn": 33667,
      "max_length": 19,
      "trust_anchor": "ripe"
    },
    {
      "prefix": "9.142.64.0/18",
      "asn": 33667,
      "max_length": 18,
      "trust_anchor": "ripe"
    },
    {
      "prefix": "9.142.96.0/19",
      "asn": 33651,
      "max_length": 19,
      "trust_anchor": "ripe"
    }
  ]
}
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
1 source observations
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid
Valid
11 Oct 04:00 UTC
2 source observations
  • ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI valid
  • routeviews2 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI valid

Next rows

Export observed prefixes: TXT · CSV · JSON

Observed AS neighbors

93 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.

93 matching neighbors · 76–93 shown

NetworkIPv4/IPv6Seen inLast observedDetails
AS393305 · Registration country: US US G2BRS-NET - G2
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS393355 · Registration country: US US SISA - SAMSUNG RESEARCH AMERICA, INC.
IPv4
routeviews2
11 Oct 04:00 UTC
Source observations
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS394763 · Registration country: US US CCCERA-AS - Contra Costa County Employees Retirement Association
IPv4, IPv6
routeviews2, routeviews6
11 Oct 04:00 UTC
Source observations
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
  • routeviews6 · IPv6 · 11 Oct 04:00 UTC
AS394993 · Registration country: US US SCVTA - Santa Clara Valley Transportation Authority
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS395011 · Registration country: US US SF-PSN - City and County of San Francisco
IPv4, IPv6
ris-rrc00, routeviews2, routeviews6
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
  • ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
  • routeviews6 · IPv6 · 11 Oct 04:00 UTC
AS395132 · Registration country: US US MWCU - Meriwest Credit Union
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS395210 · Registration country: US US WESTERNCARRIERS-CA - Western Carriers Inc.
IPv4
ris-rrc00
11 Oct 00:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
AS395323 · Registration country: US US SMC - County of San Mateo
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS395757 · Registration country: US US SCCFCU-PUBLIC01 - Santa Clara County Federal Credit Union
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS395844 · Registration country: US US LUSD - LUSD
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS395976 · Registration country: US US COMCAST-MES - Comcast Cable Communications, LLC
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS396943 · Registration country: US US SV - City of Sunnyvale
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS397030 · Registration country: US US HILTON-H - Hilton Worldwide Holdings Inc
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS397258 · Registration country: US US GTRC-01 - Graton Resort and Casino
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS397620 · Registration country: US US CITYMENLOPARK - City of Menlo Park
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS397765 · Registration country: US US CCA - California College of the Arts
IPv4
ris-rrc00
11 Oct 00:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
AS398572 · Registration country: US US MONOLITHICPOWER-SJC - Monolithic Power Systems,Inc
IPv4
routeviews2
11 Oct 04:00 UTC
Source observations
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC
AS398732 · Registration country: US US DPCCOMMERCIAL - Deutscher Properties Corporation
IPv4
ris-rrc00, routeviews2
11 Oct 04:00 UTC
Source observations
  • ris-rrc00 · IPv4 · 11 Oct 00:00 UTC
  • routeviews2 · IPv4 · 11 Oct 04:00 UTC

Previous neighbors

Clear neighbor filters

View observed neighbor graph (up to 15 AS nodes)

Lines mean observed adjacency, with no commercial direction inferred. The table above provides the same evidence and source times.

Showing 14 of 93 matching neighbors, in table sort order, independent of table page.

AS33651AS1226AS2894AS3708AS4182AS5081AS5091AS5098AS6099AS6379AS7922AS10309AS10982AS11328AS11574

Peering & locations

Loading public source data…

Registry information

ARIN · fetched 11 Oct 02:42 UTC

Resource name
CMCS
Handle
AS33651
RDAP country
Not supplied
ASN
33651

Registered organizations

Last Changed: 25 Jan 2021 20:22 UTC

Registration: 16 Feb 2005 19:59 UTC

Registry source

Allocation statistics

NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.

NRO data and format

Prefix count history

Uses the public RIPEstat Data API when requested.

Local observation changes

Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.

No retained changes are available for this resource.

Retained local prefix-count observations

Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.

SourceSnapshotFamilyPrefixesPeer coverage
routeviews2
11 Oct 04:00 UTC
IPv4
109
140.192.8.16/IPv4
routeviews6
11 Oct 04:00 UTC
IPv6
187
2406:840:feed:2::1/IPv6
routeviews2
11 Oct 02:00 UTC
IPv4
109
140.192.8.16/IPv4
routeviews6
11 Oct 02:00 UTC
IPv6
187
2406:840:feed:2::1/IPv6
ris-rrc00
11 Oct 00:00 UTC
IPv4
83
2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00
11 Oct 00:00 UTC
IPv6
186
2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00
10 Oct 16:00 UTC
IPv4
83
2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00
10 Oct 16:00 UTC
IPv6
186
2a00:5884::6/IPv6, 89.234.186.6/IPv4